(a)(i) What is the common name given to the group VII elements?

(ii) Name the hydrides of the first two elements in group VII.

(iii) State three chemical properties of group VII elements.

(b) Copy and complete the following table:

Particles	Number of Neutrons	Number of electrons	Number of prontons	Mass Number
W\(^{2+}\)	12			24
X\(^{2+}\)			8	16
Y		13		27
Z	12	11

 

(c)(i) Define each of the followinc processes: I. nuclear fission; II. nuclear fusion.

(ii) Give one use of each process in (c)(i).

(d)(i) List three types of radiation that are produced during radioactivity.

(ii) Arrange the radiations listed in

(d)(i) in order of increasing: I. penetrating power; II. ionizing power.